Second Turtle Lair (Golden Harvest/Imagi)

After the Foot Clan destroyed their sewer home in the first movie, the Turtles and Splinter spent some weeks with April O'Neil in her new apartment. However, this was problematic for all the parties involved, as the apartment was not meant to house six people, and Splinter deemed it to be time for them to find a new underground lair.

The Turtles began scouting sewer tunnels for a new lair, though Raphael almost immediately left to pursue the Foot. Michelangelo fell through a shaft in the floor, discovering himself in an abandoned train station with a stopped car, and called for Donatello and Leonardo to follow him. Despite Michelangelo's apprehension at the dust and spiderwebs, they began moving in and cleaning up immediately.

Trivia

This location was inspired by a real closed New York City Subway station called City Hall Station, which shut down in 1945.

The blueprint shows detailed layouts of the interior of the subway shaft and the sidewalk vents where pedestrians would walk overhead.

Roy Forge Smith was the production designer on all three live-action Ninja Turtle films, as well as on Monty Python and the Holy Grail and Bill & Ted's Excellent Adventure.

"G.S.G." are the initials of Geoffrey S. Grimsman, who's credited for being an art director on the film. Grimsman was also a set designer on Super Mario Bros. and the assistant art director on The Crow.